Electrically-controlled motor.



c. I. MURDOCK & H. R. GRAF.

ELECTRICALLY CONTROLLED MOTOR.

APPLICATION FILED FEB. 27. 1915.

Patented Oct. 31, 1916.

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ELECTHICALLY CONTROLLED MOTOR.

APPLICATION FIL'ED FEB. 27. 1915.

Patented Oct. 31, 1916.

4 SHEETSSHEET 2.

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ELECTRICALLY CONTROLLED MOTOR.

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ELECTRICALLY CONTROLLED MOTOR.

APPLICATlON FILED FEB-27,19l5.

4 SHEETS-SHEET 4- Patented Oct. 31, 1916.

Char/e3 j. Murdock Herman F7. 6/0, WW

' Wags III IlhIT CHARLES I. MUBDOCK, OF IEAItSI-IALL, AND HERLIAN R. GRAB, F JACKSON, MICHIGAN.

ELECTBICALLY-CONTROLLED MOTOR.

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Application filed February 27, 1915.

To all whom it may concern:

Be it known that we, Crmnnns I. MUnnoGK and HERMAN It. Gin-m, citizens of the United States, residing at Marshall, Michigan, and

Jackson, Michigan, respectively, have invented certain new and useful Improvements in Electrically-Controlled Motors, of which the following is a specification.

This invention relates to improvements in electrically controlled motors.

Our improved motor is especially de signed by us for use in damper controlled thermostats although certain features are readily adapted for other purposes.

The main objects of this invention are: First, to provide an improved electrically controlled motor. Second, to provide an improved electrically controlled motor of the weight type which is very easy to operate. Third, to provide an improved electrically controlled motor which is simple in structure and not likely to get out of repair in use.

Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow.

We accomplish the objects of our invention by the devices and means described in the following specification.

The invention is clearly defined and pointed out in the claims.

A. structure which is a preferred embodiment of our invention is clearly illustrated in the accompanying drawing forming a part of this specification, in which:

Figure I is a front view of a structure embodying the features of our invention, parts being broken away to show structural details. Fig. II is a view with the chains and weight omitted. Fig. III is an enlarged detail section on a line corresponding to the broken line 3-3 of Fig. V. Fig. IV is an enlarged detail section on the line corresponding to line 44 of Fig. I. Fig. V is an enlarged detail section on the line corresponding to the broken line -5 of Fig. II. Fig. VI is a detail section on the line corresponding to the broken line .66 of Fig. I, showing details of the stop mechanism. Fig. VII is a detail front view partially in section showing the motor stop in its engaging or actuated position. Fig. VIII is a detail sectional view showing further details of the motor stop mechanism. Fig. IX is a detail vertical section through the motor weight on a line corresponding Specification of Letters Patent.

Patented (Pet. 31, 1916.

Serial No. 11,072.

taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, the bracketlike frame 1 is provided with a top plate 2 adapted to be secured to a sill or other suitable elevated support. 011 the lower end of this frame 1 we mount an actuating lever 3 which is connected by the cables 4 and 5 to the dampers to'be controlled. The lever is mounted on the screw 6 to oscillate thereon. The lever is longitudinally slotted at 7 to receive the wrist pin 8 on the driving wheel 9. This driving wheel has a peripheral groove 10 adapted to receive the chain 11. The motor weight 12, which is best shown in Fig. IX, is a casing adapted to receive a suitable filling, not shown. A. tube 13 is arranged through the weight casing. The weight chain is passed through this tube and a pawl lat adapted to engage the chain provided. This pawl is pivoted at 15 so that it may be disengaged and the weight raised on the chain, the pawl being weighted so that when released it automatically engages the chain. The chain 11 is endless. As the driving wheel rotates the wrist pin acting in the slot 7 of the lever 3 oscillates the levers. To control the movement of the driving wheel, and through it the movement of the lever, we provide a dash-pot 1.6 which is mounted on the lever to rock therewith and is provided with a piston 17, the piston rod 18 of which is connected to an extension 19 on the wrist pin 8. The dashpot cylinder is filled with oil. The piston is of such size that the oil gradually escapes around the piston as it moves from end to end, thus controlling the movement of the driving wheel. The piston rod is arranged through a suitable packing gland 20. The dash-pot is filled through the plug 21. The driving wheel is provided with a pair of stops 22 with which the catch 23 on the control member 24: coacts. The control mem ber 24 is pivoted at 25 and weighted or balanced so that when released it is actuated by its own weight to engage the catch. The control member is returned or lifted to its catch engaging position by means of the lugs on stops 22 which coact with the cam projection 26 on the control member. The control member is retained in its engaging position by the armature 27 of the electromagnet 28. This armature is pivoted at 29 to engage the stop 30 on the disk 31, see Fig. I. Thisdisk is mounted on the journal 32 and connected to the pinion 33 meshing with a segment 84 having a pin 35 thereon engaging a slot 36 in the control member, thus holding the control member in its engaging position when the catch. 37 of. the armature 27 is engaged with the stop disk 31. The armature is provided with a weight 38 for holding it in its engaging position, the weight normally resting on the support or stop 89, see Fig. I

lVith the parts thus arranged, when the armature is actuated by the electromagnet the stop 37 is disengaged from the stop 30 allowing the actuating member to drop thereby disengaging its catch 23, releasing the driving wheel which is rotated by the weight and the actuating lever is oscillated as described.

The rotation of the driving wheel causes one of the lugs 40 to engage the cam projection 26 on the control member and return it to its catch engaging position so that as the driving wheel rotates the succeeding stop comes into contact withthe catch 23.

The electromagnet is controlled from the thermostat, shown conventionally in Fig. X, in which 41 represents the thermostat blade and 42'and 43 the thermostat contact members. The thermostat blade is connected to the battery 44 through the connection 45. The battery is connected to the electromagnct 28 through the connection 46. The electromagnet is grounded in the frame 1 as is conventionally represented in Fig. X. The thermostat contacts 42 and 48 are connected to a pair of contacts 49 by the connections 47. The contacts 49 are carried by the tubular holders 50 and are supported therein in yielding contact with the insulating disk 52 carried by the driving wheel by the springs 53 arranged within the tubular supports. The outer ends of the springs are supported bythe binding posts 54 threaded into the supports.

The driving wheel is provided with a contact 55 positioned relative tothe stops 22 so that when the driving wheel stops this Contact 55 is in engagement with one or the other of the contacts 49. The contact 55 is connected to the driving wheel, see Fig. V, thus forming the ground connection to the frame. When the thermostat blade 41 completes the circuit through the thermostat contact 42 which is then connected to the contact 49 in engagement with the contact 55 of the driving wheel the circuit is completed and the armature actuated, thus relea-sing the driving wheel as described. As soon as the driving wheel begins its rotation, however, the contact moves from the contact 49 through which the connection has been made, breaking the electric connection and allowing the armature to swing back in stop engaging position so that as the driving wheel completes its movement and lifts the control member to engaging position, the armature catch engages and the parts are held until the thermostat member 41 swings to the other contact member 42 when the cycle of movement is repeated.

To insure the closing of the dampers in the event the weight runs down we provide a sliding stop pin 56 adapted to coact with the stop pin 57 on the driving wheel. The stop pin 56 is controlled by the lever 58 pivoted at 59 and connected to the stop pin,

by means of the screw 60. The lower end of this lever is forked at (31 to be engaged by the ball 62 on the stop chain (33, which is connected to the weight 12. This chain is passed over a pulley 64 journaled at 64. The chain 63 is of such length that when the weight reaches the limit of its downward movement the ball 62 is drawn over the pulley and into engagement with the lever 58 thereby actuating the lever to shift the pin into position to connect with the stop 57. This stop 57 is positioned so that the driving wheel is stopped with the dampers in their closed position and the contact 55 out of engagement with either of the contacts 50. hen the weight is raised the stop chain is pulled up and this returns the sliding pin 56 to its inoperative position releasing the driving wheel. lVe thus, by a very simple means, insure that the dampers shall be closed when the motor becomes inoperative through the running down of the weight and that the motor shall be stopped with the electrical connection broken.

Our improved motor mechanism is comparatively simple and economical to produce and is very durable and not likely to get out of order in use as there are no delicate clockwork mechanisms or other similar parts. The electrical connections are simple and at the same time are such that they are not likely to become inoperative through use.

We have illustrated and described our improvements in detail in the form in which we have embodied the same in actual use and which we have found satisfactory. We are aware, however, that considerable variation in structural details is possible without departing from our invention and we desire to be understood as claiming our invention specifically in the form illustrated, as well as broadly within the scope of the appended claims.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent, is:

1. In a structure of the class described,

the combination with a thermostat compris- 13o Cir 1,202,880 I All ing a thermostatic element and a pair of coacting contacts, of a driving wheel having stop members thereon, a control member having a slot therein and a catch adapted to coact with said stop member on said driving wheel, said control member being weighted so that its catch is disengaged when the control member is freed, said control member being provided with a cam adapted to be engaged by lugs on said driving wheel whereby the control member is returned to its engaging position by the rotation of said wheel, an electromagnet comprising an armature having a catch thereon, a rotatably mounted disk having a stop coacting with said armature catch, a pinion on said disk, a rotatably mounted segment meshing with said pinion and having a pin engaging said slot in said control member whereby the control member is supported in its stop engaging position, a pair of contact members connected to said pair of thermostat contacts, and a contact on said driving wheel electrically connected to said electromagnet and adapted to successively coact with said contacts connected to said thermostat contacts and positioned relative to said driving wheel stop members so that it is in contact with one of them when the catch is engaged with said stop.

2. In a structure of the class described, the combination with a thermostat comprising a thermostatic element and a pair of coacting contacts, of a driving wheel having stop members thereon, a control member having a slot therein and a catch adapted to coact with said stop members on said driving wheel, said control member being returned to its engaging position by the rotation of said wheel, an electromagnet comprising an armature having a catch thereon, a rotatably mounted disk having a stop coacting with said armature catch, a pinion on said disk, a rotatably mounted segment meshing with said pinion and having a pin engaging said slot in saidcontrol member whereby the control member is supported in its stop engaging position, a pair of contact members connected to said pair of thermostat contacts, and a contact on said driving wheel electrically connected to said electromagnet and adapted to successively coact with said contacts connected to said thermostat contacts and positioned relative to said driving Wheel stop members so that it is in contact with one of them when the catch is engaged with said stop.

3. In a structure of the class described, the combination of a driving wheel having stop members thereon, a control member having a slot therein and a catch adapted to coact with said stop members on said driving wheel, said control member being provided with a cam adapted to be engaged by lugs on said driving wheel whereby the control member is returned to its engaging position by the rotation of said wheel, an electromagnet comprising an armature having a catch thereon, a rotatably mounted disk having a stop coacting with said armature catch, a pinion on said disk, and a rotatably mounted segment meshing with said pinion and having a pin engaging said slot in said control member whereby the control member is supported in its stop engaging position.

4. In a structure of the class described, the combination of a driving wheel having stop members thereon, a control member having a slot therein and a catch adapted to coact with said stop members on said driving wheel, said control member being returned to its engaging position by the rotating of said wheel, an electromagnet comprising an armature having a catch thereon, a rotatably mounted disk having a stop coacting with said armature catch, a pinion on said disk,

and a rotatably mounted segment meshing with said pinion and having a pin engaging said slot in said control member whereby the control member is supported in its stop engaging position.

5. In a structure of the class described, the combination of a supporting frame, a longitudinally slotted actuated lever pivotally mounted on said frame, a driving wheel having stop members thereon, said wheel being adapted to receive a driving, chain, an endless driving chain, a Weight adjustably mounted on said chain, a wrist pin on said driving wheel engaging said slot in said lever whereby the lever is oscillated on its pivot as the driving wheel rotates, a dash-pot carried by said lever, a piston therefor connected to said wrist pin, a catch member adapted to contact with said stop member on said driving wheel, means for releasing said catch member comprising an electromagnet, electrical connections for said electromagnet comprising a contact carried by said wheel, and a stop mechanism comprising a sliding stop pin, a forked pivoted actuating lever therefor, a pulley disposed adjacent to said fork of said lever, a chain connected to said weight and provided with a trip adapted to engage the fork of said stop actuating lever as the trip passes over the pulley and shift the sliding stop into engaging position, and a coacting stop on said driving wheel, said stop on said driving wheel being positioned to stop the wheel with the said contact carried thereby in circuit breaking position.

6. In a structure of the class described, the combination of a supporting frame, a longitudinally slotted actuated lever pivotally mounted on said frame, a driving wheel having stop members thereon, said wheel being adapted to receive a driving chain, an endless driving chain, a weight adjustably mounted on said chain, a wrist pin on said driving wheel engaging said slot in said lever whereby the lever is oscillated on its pivot as the driving wheel rotates, a catch member adapted to contact with said stop member on said driving wheel, means for releasing said catch member comprising an electromagnet, electrical connections for said electromagnet comprising a contact carried by said wheel, and a stop mechanism comprising a sliding stop pin, a forked pivoted actuating lever therefor, a pulley disposed adjacent to said fork of said lever, a chain connected to said weight and provided with a trip adapted to engage the fork of said stop actuating lever as the trip passes over the pulley and shift the sliding stop into engaging position, and a coacting stop on said driving wheel, said stop on said driving wheel being positioned to stop the wheel with the said contact carried thereby incircuit breaking position.

7. In a structure of the class described, the combination of a driving wheel having stop members thereon, said wheel being adapted to receive a driving chain, a driving chain, a weight on said chain, a catch member adapted to contact with said stop member on said driving wheel, means for releasing said catch member comprising an electromagnet, electrical connections for said electromagnet comprising a contact carried by said wheel, and a stop mechanism comprising a sliding stop pin, a forked pivoted actuating lever therefor, a pulley disposed adjacent to said fork of said lever, a chain connected to said weight and provided with a trip adapted to engage the fork of said stop actuating lever as the trip passes over the pulley and shift the sliding stop into engaging position, and a coacting stop on said driving Wheel, said stop on said driving Wheel being positioned to stop the Wheel with the said contact carried thereby in circuit breaking position. R

8. In a structure of the class described, the combination of a driving wheel adapted to receive a driving chain, an endless driving chain, a weight adjustably mounted on said chain, a stop mechanism comprising a sliding stop pin, a forked pivoted actuating lever therefor, a pulley disposed adjacent to said fork of said lever, a chain connected to said weight and provided with a trip adapted to engage the fork of said stop actuating lever as the trip passes over the pulley and shift the sliding step into engaging position, =and a coacting stop on said driving wheel.

9. In a structure of the class described, the combination of a driving wheel adapted to receive a driving chain, a driving chain,

a weight on said chain, a stop mechanism comprising a stop pin, a pivoted actuating lever therefor, a pulley disposed adjacent to said lever, a chain connected to said weight and provided with a trip adapted to engage the said stop actuating lever as the trip passes over the pulley and shift the sliding stop into engaging position, and a coacting stop on said driving wheel.

10. In a structure of the class described,

the combination of a driving chain, a weight on said chain, a stop mechanism comprising a member, an actuating lever therefor, a pulley disposed adjacent to said lever, a chain connected to said weight and provided with a trip adapted to engage said actuating lever as the trip passes over the pulley and shift the stop into engaging position, and a coacting stop on said driving wheel.

In witness whereof, we have hereunto set our hands and seals in the presence of two witnesses.

CHARLES I. MURDOCK. HERMAN R. GRAF.

[1 s] [L. s]

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

